adcelannotate = {"mobilepaywallcategory" : "MOBILE_PREM-LOCAL","nativepaywallcategory" : "NATIVE_PREM-LOCAL"};The number of Americans living to age 100 and older has surged nearly 44 percent since 2000, and they're poised to win over the nation's imaginations and hearts with their spunkiness, wisdom and can-do-attitudes, many experts say.